gnarled (adj.)

• arthritic
• bent
• bumpy
• burled
• contorted
• crooked
• distorted
• gnarly
• knobbed
• knobbly
• knobby
• knotted
• knotty
• lumpy
• nodal
• nodular
• nodulated
• noduled
• nubbly
• nubby
• studded
• tubercular
• tuberculous
• tuberous
• twisted
• warped